Boiler.



W. F. SELLERS & C. J.- DAVIDSON BOILER.

APPLICATION FILED 1111111.15, 1907.

Patented Nov. 15, 1910.

5 SHEETS-SHEET 1.

W: F. SELLERS L C. J. DAVIDSON.

BOILBR.

APPLIoATIoN FILED 1111111.15. 1907.

Patented Nov. 15, 1910.

I 5 SHEETS-SHEET 2.

W. P. SELLERS a G. J. DAVIDSON.

BOILER.

APPLICATION FILED MAR.15. 1907. y

Patented Nov. 15, 1910.

5 SHEETS-SHEET 3.

www I :ggg/MM W. F. SELLERS & C. J. DAVIDSON.

BOILER.

APPLIGATION FILED 1111111.15. 1907.

Patented Nov. 15, 1910.

5 SHEETS-SHEET 4.

W. P. SELLERS & C. J. DAVIDSON.`

Bantam APPLICATION FILED MAB..15, 1907- Patented Nov. 15, 1910.

5 SHEETS-SHEET 5.

WiL/1W Iran srnrt@ PAT T WILLIAM. r. SELLERS, or WILMINGTON, DELAWARE,AND CHARLES J. DAVIDSON, or

MILWAUKEE, WISCONSIN, ASSIGNORS MOOIE.,l DELAWARE, A CORPORATION O TOEDGE MOOR IRON COMPANY, OF EDGE- F DELAWARE.

i BoILER.

Specification-of Letters Patent. Patented Nov. 15, 1910.. `Applmationmea Maren 15, 1907. 'serial No. 362,451.

To all 'whom 'it may concern: y, 4 y I Be it known that we,:WiLLIAM F.SEL- LERs, a citizen vof the United States of Amer` ica, residing inWilmington, castle, J. DAVIDSON, a citizen of the United States ofAmerica, residing in Milwaukee, county of Milwaukee, and State of'Wisconsin, have invented a-certain new and useful `Improvement inBoilers, of which the lfollowing is a true and exactdescriptiomreference being had to the accompanying drawings, which forma part thereof.

This mvention relates to steam` venerating case boilers and isparticularly designed for use withlthe box-header ty 'ev of watertubeboilers, though the invention in all of its aspects is not limited tosuch use.-

The object of the vinvention is to im rove the mechanical constructionof -the oiler county of New- 4 and its setting andl toso arrangetheparts that the durability of the boiler will be prolonged and anincreased eiicien'cy and reliabrillity of operation will b e obtained.

h characterize our invention are pointedout with articularity in theclaims annexed to and orminga art of 'this specification. For a betterun tion, however, and the advantages possessed by it, reference may behad to the accom# panying drawings and descriptive matter 1n which wehave illustrated and described forms in which our-invention may beembodied. f

Of the drawings Figure 1 is a side elevation of a boiler with the.outside heat insulatingV covering shown in dotted lines. Fig. 2 is aperspective view of a portion of a tube and the -tiling or brick inwhich it is totally embedded. Fig. 3 is a viewsimilar to Fig. 2 showinga construction in which the tube is only partially embedded in thetiling. Fig; 4 is a sectional elevation of the boiler, taken on the line'4 4 of Fig. 5. Fig. 5 is a sectional elevation on `the line 5-5 of Fig.4.

Fig. 6 is a. sectional elevation on the line 6 6 of Fig. 4. Fig. 7 is asectional plan showing a portion of the side wall of thc boiler housing.Fig. 8 is a sectional elevation showing a portion of the front headerand one of lts supportingcolumns. Fig. 9

1s sectional elevation on the line 9L-9- of Fig. 8. 10 is asectionalelevation illus- A and State of Delaware, and CHARLES.-

e various features of novelty which erstanding of our inven `Fig. 14 isa partial trating the details of therear header support employed in themodified construction shownin Figs. 12 and 13. Fi 11 is a sectionalelevatlon taken on the 'line 11-11 of Fig. 13. Fig. 12`is a partial planview of an arrangement for supporting the rear header an differing fromthe construction shown in Figs. 1 to 9 inclusive. Fig. 13 is a rearelevation of the construction shown in Fig. 12. velevation showing a.modified form of connectionof the front header to the water legs. Fi 15is a sectional elevation taken on the Fine 15-'15 of Fig. 14. Fi 16 is apartialtransverse section of the boiler containing the modification ofFig. 14, taken about midway between the two headers.. Fig. 17 is a rearelevation of the rear header showingl a third arrangement of supportingthe rear header and connectin it to the water legs. Fig. 1 8 is a side eevation of the construction shown in Fig. 17. In the form of ourinvention shown in Figs. 1 to 9, the boiler proper consists of a frontbox-like header A and a rear box-like header B, which are connected attheir lower ends by the usual set of inclined water tubes C and at theiru per ends by the usual horizontal steam an water drum or large tubeC1.V The front header A to which the upper 'ends of the. tubes C areconnected is supp ported by two hollow columns or water legs .whichengage the under ed header at column D e of the opposite sides of theboi er. Each 1s placed 1n communication with andmechanically connectedto the header A by a nipple D1.v The rear header B is supported by twohollow columns or water legs E located one at each Side of the boiler.As shown, bearing plates B1 are located between the'header B `and theAupper ends of the columns E, to permit the sliding movement between theheader B andy the connecting it to the rear columns or legs,-

water columns E resulting from the expansion and contraction oftheboiler parts as their temperatures vary. umns E are connected at theirlower'ends by a mud drum F, having a blow-.out aperture F1. The drum Fis in communication with the header B through fiexible curved conduit-sor tubes F2. The columns D and E at eachside of the boiler are connectedto each other by a set of inclined tubes G which The water colare in thesame vertical plane with, and are parallel vto the corresponding outsiderow of tubes C. It will, 'of course, be understood that the front headerof the boiler may be movably supported by the water columns and the rearheader rigidly supported instead of asl -in the arrangement justdescribed.

The usual abutment or wall H forms the rear wall of the fire box andsupports the rear ends of the grate bars H1, the front ends of which aresupported by the front wall I .of the boiler. The usual diaphraofms orbailles .l are provided to cause the flame to circulate in the mannerindicated by the large arrows in Fig. 4.

The side walls of the furnace are lined by blocks of heat resistingtile'or brick K. As shown in Figs. formed that the outer halves oftheouter row of tubes C and the portions of the tubes G at the rear ofthewall H are partially embedded in the tiling, while the portions of thetubes G at the side of the fire box areven.-

tirely embedded in the tiling.

The tiling is held in place against the tubes C and G by an outerframe-work consisting of vertical metalbars L, each of which in the formshown has a portion or rib L1 extending transversely to the side of thefurnace, andhaving its inner edge bearing against the outer surface ofthe tiling, and cross bars L, L4 and L5. From the `outer edge of eachrib L1 extend flanges or ribs L2, which are parallel to the side of thefurnace. Pads M of suit-able heat insulating material are preferablyinserted between the aan heat insulating material.

and the adjacentv edge of the rib L1. In tie form shown the upper crossbars LS and L" are riveted at their ends to the headers A and B and thelower cross bars L5 are anchored in any suitable manner to the boilerstructure 01,', foundation. Between each adjacent pair of ribs L1 andbetweenthe tiling'and the flanges L2 are removably inserted a series ofblocks N of a These blocks may consist of layers N1 of an asbestoscomposition having air cells N2 formed in them. Preferably a'n a'r spaceO is formed between the tiling'and the blocks N. The blocks and thetiling may be spaced apart to form the air space O, by t e spacers O1which may be 1n the form of lugs formed boiler as a whole may jacket orcoating of a heat insulating plaster either on the tiling or on theblocks. The be covered by a or compound P. It will be understood thatthe boiler is connected at its rear end to a source of cold water in anysuitable manner (not shown in the drawings).

W ith the construction described the circulation through the tubes G isas follows:

Relatively cold water enters the drum F r from the header B through thetubes F.

5 and 6, the tiles K are so From the drum F water passes into the columns E, and from them through the tubes G and water columns'D into theheader' A. The circulation of the water through the tubes G not onlyincreases the capacity of the boiler by increasing the effective heatinsurface, but also prolongs the life of the tiling by withdrawing heatfrom it as well as directly from the llame. The water columns and tubesser-ve, therefore, not only as an effective sup ort fdr the boilersetting, but also as an'e cient feed water heater, while at the sametime they-make the boiler more durable. l j

The boiler housing described is simple and relatively cheapto'construct', possesses good` mechanical and heat insulatingproperties, and may be repaired w1thcomparat1ve ease.

Instead of supporting the rear header of theboiler from the rear legs E,we may support the header from the foundation work, as illustrated inFigs.- 10 to 13, inclusive, in

which the rear header is provided with a' saddle lB2 having bars B3secured to it to form a seat for a rocker B4 the lower end of which isseated ina support B5, secured. to a -pier Hl at the rear end of theboiler. As shown the rocker B4 is in the form of a bar having its upperand lower edges rounded. This construction is one found to be highlysatisfactory in taking care of the movement of the rear header, due tothe expansion and contraction of the boiler parts, as the temperature ofthe boiler changes. l

In the form of ourinvention shownin Figs. 10 to 13, inclusive, each ofthe. two rear legs E is connected to the header by a flexible connectionF3 made -up of jointed piping. In this form the drum has been dispensedwith and- F* represents the connection for a blow-olf cock. The water issupplied to the boiler either directly to the rear header B or throughthe water legs E, in any suitable manner (not shown in the drawing I-nder some conditions we fin-Et it desirable to make the 4fire box widerthan the boiler roper. One means of accomplish-ing this is illustratedby the constructlon shown in Figs. 14 to 18, where the tubes Gr andfront and rear water legs D and E, at one side of the boiler are not 1nthe same plane with the outer row of tubes C but are at one side of saidlane. With this construction the front legsl are connectedto the headerA by means of horizontallyl extendin hollow trunnions or nipples A1,Vhaving anges A2 securedl to the header, which trunnions or nipplesextend laterally into the legs D through-openin s formed to receivethem.

V The rear hea er may be 'supported in the manner illustrated in Figs.17 and 18,

where each leg E is provided with a pintle or trunnion Ff and the headerB is provided with a snnilar pintle or trunnion E4. A

losy

rocker plate E2 connects each pair of bosses, being providedA with alower aperture receiving the pintle E3, and an upper aperturereceivinofA the pintle E4. In this form of our inventlon the legs E areconnected to the header` by thel jointed piping F3, as in theconstruction shown in Figs. 10 to 13, and, of course, the rockerconstruction illustrated best in Fig.`10, which arrangement we regard asthe preferable form of support for the rear header, may be employed withthe laterally displaced legs E of Fig. 17, in-l stead of the pintles E3and E4 and the rockers E2. v

Where the tubes G are spread apart the single vertical tile retainingparts L of the construction shown in Figs. 1 to 9, inclusive, arereplaced by upper bars LG at the sides of the tubes C and lower bars L7at the sides of the tubes G. The lower ends of the bars L6 are connectedto a cross bar L9 and the upper ends of the bars L7 are connected to across bar L1". Short horizontal bars L8 connect the cross bars L9 andL10. i

While the forms of our invention disclosed have been found in actualpractice to be very satisfactory, it will be readily understood by thoseskilled in the art that changes may be made in the form of our inventionwithout departing from its spirit.

Certain novel features in the construction and arrangement of thefurnace housing disclosed but not claimed herein are claimed in mycopending application, Serial No. 488,834, filed April S), 1909, as adivision of this application.

Having now described' our invention, what we claim as new and desire tosecure by Letters Patent is,

1. In a boiler, a pair of box headers, tubes connecting them, a pair ofhollow columns adjacent each header, tubes connecting each column with acolumn for the other header and connections between each header and theadjacent column, the connections between one header and the adjacentcolumns being amitie. l

2. In a boiler, a pair of box headers, tubes connecting said headers, apair of hollow columns extending downwardly from each header'andarrangedone at each end of the header, nipples connecting one headerwith the, adjacent columns, flexible piping connecting the other headerand the corresponding columns, and tubes at the side of the fire boxconnecting each column adjacent one header with the corresponding columnadjacent the other header.

3. In a boiler, a pairof headers. a 'set of inclined tubes connectingthem, hollow columns arranged two at each side of the boiler, one ateach end of `each header, said columns extending from the headers to thefloor level, other inclined tubes connecting said columns,,provisionsfor obtaining a watercirculation through said columns and the tubesconnecting them, a furnace lining consisting of tile, in Iwhich thesidetubes of said set of tubes and said other tubes are embedded. the tubesadjacent the-fire box being entirely embedded in said tiling and theremaining portions of the ltubes having inner surface portions exposed.

4. In a boiler, a pair of headers, a set of inclined tubes connectingthem, hollow columns arranged two at each side of the boiler, one ateach rend of each header, said columns extending from the headers to thefloor level, other inclined tubes connecting said columns, provisionsfor obtaining a water circulation through said columns andthe tubesconnecting them, afurnace lining consisting of tile, in which the sidetubes of said set of tubes and said other tubes are embedded, the tubesadjacent the fire box being entirely embedded in said tiling and theremaining portions of the tubes having inner surface portions exposed,and ametal bar framework for holding said ltiling against said tubes.

5. In a boiler, a pair of headers, inclined tubes connecting them,hollow columns at the sides of the boiler, one extending down- -wardlyfrom each end of each header, in-

clined tubes connecting said columns, provisions for obtaining a watercirculation' through said columns and the tubes connecting them, a.furnace lining consisting of tile,

in which the tubes at the side of the tire box are wholly embedded andin which the retaining framework for said tiling, comprising metal bars,is located and heat insulating blocks slidingly received between eachpair of adjacent bars.

6. In a boiler, a pair of headers, inclined tubes connecting them,hollow columns at the sides of the boilers, one extending downwardlyfrom each end of each header, inclined tubes connecting said columns,provisions for obtaining a Water circulation through said columns andthe tubes connecting them, a. furnace linin 'consisting of tile, inwhich the tubes at t e side of the tire box are wholly embedded and inwhich the remaining portion of the tubes are partially embedded, aretaining framework Lfor said tiling, comprising vertical bars, heatinsulating blocks slidin ly received between each pair of adjacent gars,and means for spacing` said blocks away from said tiling.

7. In a boiler, a pair of headers, inclined tubes connecting them,hollow columns at the sides of the boiler, one extending downwardly fromeach end of each header, inclined tubes connecting said columns, afurnace lining consisting of tile, in which the tubes at the side of thefire box are wholly embedded and in which the remaining portion of thetubes are partially embedded, a retaining framework for said tiling,comprising vertical bars, heat insulating blocks slidingly-receivedbetween each pair of adjacent bars, and means for spacing said blocksaway from said tiling.

8. In a boiler, a pair of box headers, tubes connecting said headers, apair of hollow columns extending downwardly from each header andarranged one at eac end of the header, nipples connecting one headerwith the adjacent columns, flexible piping connectin the other headerand the corresponding co umns, and tubes at the side ofthe fire boxconnecting each column adjacent one header with the corresponding columnadv15 jacent the other header, the columns at opl posite sides oftheboiler-being spaced apart so that the tubes connecting the columns'areseparated by a distance greater than the dls- 'tance between theopposite side tubes conf necting the headers. v l

WILLIAM F. SELLERS.- CHARLES J. DAVDSON.

Witnesses to the signature of William F` Sellers: y

ARNOLD KATZ,

STEWART. Witnesses to the signature of: Davidson:

M. S. RAUsoH, GEO. F. KELLY.

Charles J.

